This is an extended version of the kitchen scene where Mrs. Doubtfire puts cayenne pepper into Stu's dish. Very funny!
Update: I've seen some posts where people say this was not a deleted scene. They are incorrect in stating that. The movie is exactly 125 minutes according to IMDB. If this scene was in the movie, you would be going over the 125 minutes. Yes, Mrs. Doubtfire goes into the kitchen in the original, but she does not have any interaction with the chef. She just grabs the cayenne pepper, puts it on Stu's jambalaya, and then says "Hot Jambalaya!" Hope this puts the doubters to rest...but probably not.